1221416442 has 32 divisors (see below), whose sum is σ = 2873923200. Its totient is φ = 383189184.

The previous prime is 1221416411. The next prime is 1221416453. The reversal of 1221416442 is 2446141221.

1221416442 is a `hidden beast` number, since 1 + 2 + 2 + 14 + 1 + 644 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664342 + ... + 666177.

It is an arithmetic number, because the mean of its divisors is an integer number (89810100).

Almost surely, 2^1221416442 is an apocalyptic number.

1221416442 is an abundant number, since it is smaller than the sum of its proper divisors (1652506758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221416442 is a wasteful number, since it uses less digits than its factorization.

1221416442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330547 (or 1330541 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1221416442 is about 34948.7688195164. The cubic root of 1221416442 is about 1068.9430976428.

Adding to 1221416442 its reverse (2446141221), we get a palindrome (3667557663).

The spelling of 1221416442 in words is "one billion, two hundred twenty-one million, four hundred sixteen thousand, four hundred forty-two".